I got a book at a college lab sale 25 odd years ago that I like to peruse often. It's actually an electronics textbook called "Transistors" by Milton S Kiver.
First published in 1956, a lot of the book studies transistor circuits while comparing them to equivalent circuits built with vacuum tubes.
It's actually a good textbook; I always had trouble with semiconductor theory in college and this book approaches everything from an electron flow point of view rather than conventional flow. Things became much clearer to me. Also was my first real exposure to vacuum tube theory.